Which of the following groups of children are most likely to have the most similar IQ scores?
A) opposite-sex fraternal twins
B) siblings reared together
C) identical twins reared apart
D) same-sex fraternal twins

Question

Quizplus · Accepted Answer

Identical twins reared apart are most likely to have the most similar IQ scores as their genetics are identical, whereas their environment and upbringing are different. Opposite-sex fraternal twins may have different genetics due to being a result of two different eggs and two different sperm, and same-sex fraternal twins may have different environments due to different experiences or relationships with their twin. Siblings reared together also have different genetics and may have different upbringing or experiences.

Which of the Following Groups of Children Are Most Likely